How to Grow Red Knight Pepper
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Red Knight Pepper
Capsicum annuum 'Red Knight'
vegetableRed Knight is a compact, determinate bell pepper variety prized for its early maturity and reliable production of blocky, thick-walled red fruits. It was specifically bred to produce full-sized peppers in cooler climates and shorter growing seasons. This variety is excellent for both home gardeners and commercial growers seeking consistent yields.
When should you plant Red Knight Pepper in your zone?
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Example Red Knight Pepper timeline · Pittsburgh, PA (Zone 6b)
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Plant Red Knight Pepper
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Red Knight Pepper
Around Jun 16≈ 60 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Red Knight Pepper dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Zones 5-10, but thrives even in zones 3-4 due to early maturity
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Seedling
2-3 weeksCotyledons emerge, followed by first true leaves. Plant is 1-2 inches tall with delicate foliage.
Maintain warm soil (70-80°F), provide bright light (14-16 hours daily under grow lights), keep soil moist but not waterlogged, ensure good air circulation to prevent damping off.
Vegetative Growth
3-4 weeksSturdy stems develop, plant grows 4-8 inches with multiple leaves. Compact, bushy growth pattern emerges.
Continue warm conditions, thin to strongest plants if needed, begin gradually hardening off 1-2 weeks before transplanting outdoors, fertilize every 2 weeks with balanced fertilizer.
Transplanting & Establishment
1-2 weeksPlant is 6-8 inches tall with 4-6 true leaves, ready for outdoor planting after last frost. Initial roots establish in garden soil.
Harden off over 7-10 days, plant after soil reaches 60°F minimum, space 18 inches apart, water gently but thoroughly after planting, provide shade cloth first week if temperatures exceed 85°F.
Flowering & Early Fruiting
3-4 weeksWhite flowers appear at leaf axils around 30-40 days after transplanting. Small green peppers begin forming after pollination.
Maintain consistent watering and mulching, apply balanced or slightly phosphorus-rich fertilizer every 2-3 weeks, ensure pollinator access (bees, hand-pollinate if needed), avoid excessive nitrogen which delays fruiting.
Fruit Development & Maturation to Red
4-6 weeksPeppers enlarge from golf ball to full blocky size (3-4 inches), color transitions from green to glossy red. Walls thicken significantly.
Continue consistent watering (critical for fruit quality), mulch maintains even soil moisture preventing cracking, support heavy fruit clusters with stakes or cages if needed, resist harvesting green peppers to allow full red maturation (2-3 weeks after full size).
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with insecticidal soap or neem oil; introduce ladybugs or lacewings; strong water spray to dislodge
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Increase humidity and air circulation; spray with miticide or neem oil; reflective mulches deter them
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Remove infested fruits immediately; use pheromone traps; pyrethrin sprays; rotate crops yearly
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Row covers early season; kaolin clay spray; neem oil; trap crops with trap crops
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Yellow sticky traps; neem oil spray; insecticidal soap; encourage natural predators
Uses
Fresh eating and cooking
CulinaryRed Knight peppers are versatile in the kitchen due to their thick walls and sweet flavor when fully red. Excellent raw in salads, sliced as snacks, or cooked in stir-fries, roasted, stuffed, or grilled. [source]
Preservation
CulinaryThe thick-walled fruits are ideal for freezing, canning, and roasting for long-term storage. Can be preserved in oil, vinegar, or by drying. [source]
Vitamin C and antioxidants
MedicinalRed peppers are rich in vitamin C, capsanthin, and other powerful antioxidants that support immune function and eye health. One medium red pepper provides over 200% of daily vitamin C needs. [source]
Ornamental garden value
HouseholdThe compact Red Knight plants produce showy green and red peppers that add visual interest to vegetable gardens and containers. The bushy habit fits well in decorative garden designs. [source]
Pollinator support
WildlifeThe white flowers attract bees, butterflies, and other pollinators, supporting garden biodiversity while improving pepper fruit set. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Red Knight peppers mature to full red color in 70-90 days from transplant. Harvest when peppers reach full size (3-4 inches long) and are uniformly red with glossy skin—this typically takes 2-3 weeks after they reach full green size. Use a sharp knife or pruners to cut the stem; avoid pulling to prevent branch damage. Picking peppers encourages more blooms and fruit. Peppers left on the plant slightly longer become sweeter.
Fun Facts
- 🌱 Red Knight was bred specifically for cooler climates and shorter growing seasons, making it one of the fastest-maturing bell pepper varieties—a game-changer for northern gardeners.
- 🌱 The transformation from green to red involves the natural breakdown of chlorophyll and accumulation of carotenoids; red peppers are significantly sweeter and contain about 3 times more vitamin C than green peppers.
- 🌱 The variety's compact, determinate growth habit means plants max out at 18-24 inches tall, making it ideal for containers, small spaces, and even patio gardening.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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